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  • 51 reviews

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Ladies, we built this top to fit like a second skin while providing protection from harmful UV rays, and a cooling sensation when wet. 2 vertical pockets along the spine hold lightweight essentials (gu, id, cc, key) or sponges/ice from aid stations to provide additional cooling. 

Sizing: Please refer to the size chart button above for sizing guidance. 
Fit Type: Form-fitted
Fit Note:
 Please do not assume your size is the same as previous years, please use our size chart and if in doubt, email us at: Triathlon apparel is meant to fit next-to-skin. This is to eliminate potential chafing, and unnecessary drag during the swim, bike and run. If you’re not comfortable with this type of fit and or are between sizes, we recommend sizing up. Garment will fit the most snug the first time you put it on, it will relax slightly once wet.

Features and Benefits: 

  • Skin Cooler 90™ stretch fabric blocks 90% UVB rays while creating a cooling sensation that actually keeps you cooler.
  • Cooling technology is embedded in the fabric and will NOT wash out, contrast difference to many other "like" products on the market.
  • Two vertical pockets for nutrition gels, ice, or cold sponges commonly available at aid stations in triathlons and long endurance races.
    • Pockets line up along your spine and are designed to help cool your body.
    • The pockets are not designed to carry excessive weight such as water bottles, gel flasks, or any comparable weight.
  • Offset seams eliminate the potential to chafe.
  • This is not a compression garment, yet it is supposed to fit snug, for aerodynamic purposes. Though it is designed to be worn alone and performs best that way, you can wear it over or under any triathlon top, tri suit, cycling jersey, golf shirt, or tennis shirt, and you will actually be cooler!
  • Reflective logos for increased low-light visibility 
  • The top can double as a warm weather base layer. Please note that the cooling feature will not work as well as intended when layered.
  • Designed and created by women.
  • This garment is not designed for repeated use in a chlorinated pool.
  • Made in the USA
  • Size XL and 2X-Large qualifies for our Biggest Winner promotion. Buy this item at full price and if you need to size down within 2 years we’ll give you a 50% discount on a smaller size. Read more here - Biggest Winner 


What makes ours different?  Our Skin Cooler fiber is designed to feel and perform like silk (from a silkworm).  Through Biomimicry, we took the virtues of this natural fiber and created a synthetic silk.  It will keep you cool in hot weather and cooler when it is wet.  Put it on and you will instantly feel the cool sensation.  Wet it and you will notice a drop in the surface temperature of the skin between 7 and 10 degrees.

A MEDICAL TESTIM0NIAL:  We received this letter from Dermatologist and Mohs Surgeon Dr. Michael Bax.* 

 I am an avid runner and triathlete and I recently discovered your Skin Cooler products, of which I'm a huge fan.  I have been wearing them for a few months now and couldn't be happier.  I am a dermatologist and Mohs surgeon at Roswell Park Cancer Institute in Buffalo, NY.  Every patient I see is plagued by basal cell carcinoma, squamous cell carcinoma, or melanoma.  I recommend your products to my active patients on a daily basis.  It allows them to continue their active lifestyle while protecting themselves from the sun. I find your product to be far superior to all other cooling and sun protective lines.  I truly appreciate your efforts and innovations. 

Michael Bax, MD 
Roswell Park Cancer Institute 
Scott Bieler Clinical Science Center 
Buffalo, New York

***Dr. Bax has no financial investment in De Soto Sport and was not solicited nor compensated in any way for his letter.

Note: No garment should ever be a substitute so we always recommend you wear sunscreen underneath these, and all, products. It is crucial to keep in mind that a sunscreen's (whichever brand you may choose) SPF/UPF rating refers only to its ability to protect skin from UVB radiation. Because we know that UVA damage can be just as insidious, it is essential for the health of your skin that you use a sunscreen that contains the UVA-protecting ingredients of titanium dioxide or zinc oxide.



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Customer Reviews
4.9 Based on 51 Reviews
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United States
skin cooler long sleeve

i love the shirt for its cooling effect and i wear it on my ultra running adventures, 50k's, 50 miles and beyond during hot weather. i had to buy xtra large even though i am a small person. extra large is snug everywhere but the sleeves which were huge and i had to have it altered for $28. the shirt was worth it to me to pay for the alteration but i wish it would have fitted right initially.

Liana C.
United States United States
Love these Skin Cooler Long Sleeve Women’s shirts

I purchased 3, one white and two with adorable patterns. I wear them for golf because I cannot have my arms exposed to Sun. They do keep me cool and the fit is fantastic. I’ve received many compliments and most importantly they perform as promised. DeSoto is a quality company I am glad I found them.

Sheri C.
United States United States

Love my "cooler" shirts! Great skin protection while cooling!

Liana C.
United States United States
Excellent shirt, so comfortable and does keep me cool

I loved the first shirt I purchased so much that I bought it in another color and in White. I would buy every color if there were more. The shirt fits great and it literally does keep me cooler in the heat. I am an avid golfer but have nerve damage from the sun and can no longer expose my arms to sun. These shirts are fabulous and keep me comfortable even in the hot sun and humidity. Service is great and I am so excited to find De Soto Sport. These are so much better than sun sleeves and Cuter than other sun shirts on the market.

United States United States
Loving the fit!

I've had 6 skin cooler long sleeved shirts in the past and love them, but I've always gotten men's for 2 reasons - 1) I was afraid the women's wouldn't fit me well due to some wonky body structure (especially arms); and 2) sorry, but the men's colors and designs are better. :( I lost a fair amount of weight recently and the men's small is still a bit big, so I decided to bite the bullet and try the women's. WOW. I "measure" as a small, so I threw caution to the wind and ordered a small. It's a perfect fit. PERFECT. As in, second skin kind of perfect (though without being too tight or compressively so, just extremely snug). But that's the idea - it's better for wicking and I assume it's better for the cooling effect. I wore it today for a 17.5 mile run. Perfect. Hot & humid, so wicking had nowhere to wick and it did get soaked, but I also felt the cooling effect at times. And I had the peace of mind knowing that, even though I was outdoors for 3 hours, I was well-covered with an extra layer of sun protection (I still do sunscreen underneath). I'm a convert and I will be ordering more. Again, I measure as a small and that's what I got. It fits me pretty much exactly as intended, so I believe a medium would have been too big. I'd rate it as "true to size." I'm attaching a photo. Hopefully the mismatched patterns and colors won't hurt anybody's eyes! :) Also... can we get some of the men's shirt colors & designs in the women's models, please???? :)



  Bust Waist Hips
X-Small 31"- 33"in / <79 - 84 cm 22"- 24" in / 56 - 61 cm 30”- 33” in / 76 - 84 cm
Small 34"- 36" in / 86 - 91 cm 25"- 27" in / 65 - 69 cm 34”- 35” in / 86 - 89 cm
Medium 37"-39" in / 94 - 99 cm 28"-30" in / 70 - 77 cm 36”- 38” in / 91 - 97 cm
Large 40"- 42" in / 101 - 107 cm 31"- 33" in / 79 - 84 cm 39”- 41” in / 99 - 104 cm
X-Large 42"- 44" in / 107 - 112 cm 34"-36" in / 86 - 91 cm 42”- 44” in / 107 - 112 cm
XX-Large 44"+ in / 112 cm + 36"- 38" in / 92 - 97 cm 44”- 46" in / 112 - 117 cm


The size chart above should serve as a general guide. If you would like assistance in determining the proper size, please send the following information to

BUST - Fullest part of breast, measured as the largest part of circumference right over the pectoral muscle.
WAIST -  Circumference measured at the belly-button line - this is NOT the same as your pants waist size.
HIPS - Circumference measured at the widest point, NOT at your hips where your belt may go. Typically this will measure just a few inches below your hip bones and around the largest part of the glutes.


If you do not have a tape measure and you need something to measure with, use a belt, or smart phone power cord, and a ruler.
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